<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>WenSocket</title>
    <style>
        div{
            width: 200px;
            height: 200px;
            border:1px solid;
            margin-top: 5px;
        }
    </style>
</head>
<body>
    <input type="text" placeholder="请输入内容">
    <button>提交</button>
    <div></div>
    
    <script>
        const input = document.querySelector('input')
        const button = document.querySelector('button')
        const div = document.querySelector('div')
        
        //创建WebSocket实例
        const socket = new WebSocket("ws://localhost:8080/ws")
        
        //监听服务是否链接
        socket.addEventListener('open',()=>{
            div.innerHTML = "服务链接成功"
        })
        //button触发点击事件，将input框中的内容发送至websocket
        //查看websocket是否接收到数据：chrome F12打开控制台》Network》WS》echo.websocket.org》messages
        button.addEventListener('click',()=>{
            const value = input.value
            socket.send(value)
        })
        // 将接收到的数据插入到div中
        socket.addEventListener('message',(e)=>{
            console.log(e)
            div.innerHTML = e.data
        })
    </script>
</body>
</html>